Improvement in saw-sets



UNITED STATEs PATENT OFFICE.

FERNANDO e. BARBER, 0E oXEoRD, MIoHreAN.

IMPROVEM ENT IN SAW-SETS.

Specification forming part of Letters Patent No. 170,657, dated December7, 1875; application filed March 29, 1875.

To all whom it may concern Be it known that I, FERNANDO G. BARBER, ofOxford, in the county of Oakland and State of Michigan, have inventedcertain new and useful Improvements in Saw-Sets; and I do hereby declarethat the following is afull, clear, and exact description thereof, whichwill enable others skilled in the art to which it pertains to make anduse the same, reference beinghad to the accompanying drawings, and tothe letters of reference marked thereon, which form part of thisspecification.

The nature of my invention consists in the construction and arrangementof a saw-set, as will be hereinafter more fully set forth.

In the annexed drawing, Figure l is a side view of my saw-set, and Fig.2 is a detached perspective view of the upper jaw.

A and B represent two handles, formed respectively with the upper jaw Gand lower jaw D at their front ends, and put together with an ordinarymilled joint and rivet.

Between the handles A B is a spring, E. arranged to spread the jawsapart. Through the upper jaw O is passed a set-screw, G, for regulatingthe pitch of the teeth, and farther inward, in the under side of saidjaw O, is inserted a die, a, for setting the saw-teeth. In the oppositesurface of the lower jaw D is made a recess, b, as shown in Fig. 1, sothat when the tooth is inserted and the jaws brought together, the toothwill be set into space, or, in other words, there is no bearing for thetooth under that portion thereof operated upon by the die a, so that themetal will have room to be bent therein with freedom and ease.

My object in dispensing with a lower die or anvil is, that the tooth,when bent over the sharp angle of wall of recess b into space, is lessliable to spring back when pressure is removed than if the set wereeffected upon an anvil, and, also, whateversl-ight springing back it maybe liable to may be compensated by giving a slightly greater initialbend to the tooth than is actually required for the set desired. Thelength or distance the saw-tooth is to enter is regulated by means of agage, H, adjusted on the lower jaw D, and held by a set-screw, d.

The inner surface of the lower jaw D, outside of the recess 12, is madeat an incline of about forty-five degrees, more or less, and on thisinclined surface the saw-blade is placed, and it forms a firm and solidbearing for the same. When the jaws are closed, or rather when the upperjaw is shut down on the lower jaw, the end of the set-screw Gr comesagainst the saw-plate, allowing the die a to set the tooth just so far,and no farther. The degree of set is regulated by means of thisset-screw, the saw-plate in all cases resting against the inclinedsurface of the jaw D. This saw-set is simple in construction,easilyoperated, and not liable to get out of order. 7

Having thus fully described my invention, what 1 claim as new, anddesire to secure by Letters Patent, is

1. The jaw D, having the inner surface, on which the saw is placed,inclined, and pro vided with the recess 1), into which the tooth is set,substantially as and for-the purposes set forth.

2. The combination of the pivoted handles A B, with spring E betweenthem, the jaw G, with die a, and set-screw G, and the jaw D, providedwith the recess 1), and having the inner surface inclined, as shown,substantially as and for the purposes set forth.

In testimony that I claim the foregoing as my own, I affix my signaturein presence of two witnesses.

FERNANDO G. BARBER.

Witnesses:

L. W. STANTON, W. M. TRAvIs.

